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Finding the Third Proportional to 258,208 and 559,309

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Solution

The third proportional to 258,208 and 559,309 is: 1,211,529.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,208 : 559,309 = 559,309 : x
  2. Step 2: Convert to fraction form
    258,208/559,309 = 559,309/x
  3. Step 3: Cross multiply
    258,208x = 559,309 × 559,309
  4. Step 4: Simplify right side
    258,208x = 312,826,557,481
  5. Step 5: Solve for x
    x = 312,826,557,481/258,208
  6. Step 6: Final answer
    x = 1,211,529.30

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.